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- Manufacture of instruments and appliances used in medical, surgical, dental or veterinary practice, including electro-diagnostic apparatus such as electrocardiographs, dental drill engines, opthalmic instruments including sight testing sets, syringes, needles used in medicine and the like (5)
- Manufacture of mechano-therapy appliances; massage apparatus; artificial respiration or other therapeutic respiratory apparatus; other breathing appliances and gas masks other than simple protective masks (1)